This LilyPad Button Board gives you a very discrete button without any sharp edges. Button closes when you push it and opens when you release (momentary push button).

LilyPad is a wearable e-textile technology developed by Leah Buechley. Each LilyPad was creatively designed to have large connecting pads to allow them to be sewn into clothing. Various input, output, power, and sensor boards are available. They're even washable!